
/**
 * 去除字符串两端空格
 * @returns
 */
String.prototype.trim = function(){  
	return this.replace(/(^\s*)|(\s*$)/g, "");  
};

/**
 * 字符串真实长度
 * @returns
 */
String.prototype.getBytes = function() {    
    var cArr = this.match(/[^\x00-\xff]/ig);    
    return this.length + (cArr == null ? 0 : cArr.length);    
};

/**
 * 字符串是否为空
 * @returns {Boolean}
 */
String.prototype.isEmpty = function() {
	if (this != null || this != undefined || this != '') { 
		return false;
	} 
	return true;
};

/**
 * 日期格式化:new Date().format('yyyy-MM-dd hh:mm:ss')
 * @param format
 * @returns
 */
Date.prototype.format = function(format){
    var o = {
        "M+" : this.getMonth()+1, //month
        "d+" : this.getDate(),    //day
        "h+" : this.getHours(),   //hour
        "m+" : this.getMinutes(), //minute
        "s+" : this.getSeconds(), //second
        "q+" : Math.floor((this.getMonth()+3)/3),  //quarter
        "S" : this.getMilliseconds() //millisecond
    };
    
    if(/(y+)/.test(format)){
    	format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
    }
    
    for(var k in o){
    	if(new RegExp("("+ k +")").test(format)){
    		format = format.replace(RegExp.$1,RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
    	}
    }
    
    return format;
};

/**  
 * 将数值四舍五入(保留2位小数)后格式化成金额形式  
 *  
 * @param num 数值(Number或者String)  
 * @return 金额格式的字符串,如'1,234,567.45'  
 * @type String  
 */    
function formatCurrency(num) {    
    num = num.toString().replace(/\$|\,/g,'');    
    if(isNaN(num))    
    num = "0";    
    sign = (num == (num = Math.abs(num)));    
    num = Math.floor(num*100+0.50000000001);    
    cents = num%100;    
    num = Math.floor(num/100).toString();    
    if(cents<10)    
    cents = "0" + cents;    
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)    
    num = num.substring(0,num.length-(4*i+3))+','+    
    num.substring(num.length-(4*i+3));    
    return (((sign)?'':'-') + num + '.' + cents);    
}    
     
/**  
 * 将数值四舍五入(保留1位小数)后格式化成金额形式  
 *  
 * @param num 数值(Number或者String)  
 * @return 金额格式的字符串,如'1,234,567.4'  
 * @type String  
 */    
function formatCurrencyTenThou(num) {    
    num = num.toString().replace(/\$|\,/g,'');    
    if(isNaN(num))    
    num = "0";    
    sign = (num == (num = Math.abs(num)));    
    num = Math.floor(num*10+0.50000000001);    
    cents = num%10;    
    num = Math.floor(num/10).toString();    
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)    
    num = num.substring(0,num.length-(4*i+3))+','+    
    num.substring(num.length-(4*i+3));    
    return (((sign)?'':'-') + num + '.' + cents);    
}
